CAJ | 학술논문

循环伏安法表明，在NaOH底液中核黄素丁酸酯（ribo flavine tetrabutyrate,RT）在汞电极上有一对氧化还原峰，其峰电位Epc=E pa=-0.64V（vs．Ag/AgCl）。本文用多种电化学手段对RT的吸附特性进行了较详细的研究。吸附粒子为RT中性分子，测得RT在汞电极上的饱和吸附量为5.42×10-11 mol/cm2，每个RT分子所占电极面积为3.06 nm2，RT在悬汞电极上的吸附符合 Frum kin等温式。测得吸附系数β=4.6×105，吸引因素γ=1.10,吸附自由能ΔG°=-32.30 kJ /mol。本文还用循环伏安法研究了RT的电极反应动力学性质，测定了其在汞电极上的反应速率常数。
순배복안법표명，재NaOH저액중핵황소정산지（ribo flavine tetrabutyrate,RT）재홍전겁상유일대양화환원봉，기봉전위Epc=E pa=-0.64V（vs．Ag/AgCl）。본문용다충전화학수단대RT적흡부특성진행료교상세적연구。흡부입자위RT중성분자，측득RT재홍전겁상적포화흡부량위5.42×10-11 mol/cm2，매개RT분자소점전겁면적위3.06 nm2，RT재현홍전겁상적흡부부합 Frum kin등온식。측득흡부계수β=4.6×105，흡인인소γ=1.10,흡부자유능ΔG°=-32.30 kJ /mol。본문환용순배복안법연구료RT적전겁반응동역학성질，측정료기재홍전겁상적반응속솔상수。
Cyclic voltammetry shows that, in a supporting ele ctrolyte of NaOH,riboflavine tetrabutyrate（RT）has a pair of cathodic and anodi c peaks at Hg electrode. The peak potentials Epc=Epa=-0.64　 V（vs.Ag/Agcl）.　The adsorptive characteristics of RT are explored in detai ls with various methods.　The adsorbed species is most probably neutral molecule of RT.The saturated adsorption amount of RT at Hg electrode is 5.42×10-11 　mol/cm2 and every RT molecule occupied 3.06　nm2. On the surface of HMDE ，the adsorption of RT obeys Frumkin dasorption isotherm. The adsorptive coeffic ient β，the attractive factor γ are 4.60×105，1.10 and the adsorption free energy ΔG, is　－32.30　kJ/mol, respectively. The electrode proc ess kinetic behavior has also been studied by using cyclic voltammetry. Under th e experimental conditions the rate constants for electron transfer are determine d. The values of ks are in good agreement with literature′s results.